Since the service requirements of a utility depend on the distribution of population and land use in the service area, the planning for future requirements depends on accurate projections of future distributions. This systems approach model organizes land use data as an aid to facility planning. Included as variables are residential, commercial, governmental, and residual land areas, and employments, population density, and urban change rates. Computer program specifications, miscellaneous data inputs, and debugging hints are also included. (RA)